Warning: Details included in this article are disturbing and may be upsetting to readersA jury in Oklahoma found the younger of two brothers guilty late Wednesday night of fatally stabbing their parents and three siblings.Jurors handed down the verdict during the fourth week of the trial of Michael Bever, 19, who was charged with five counts of first-degree murder and one count of assault and battery with intent to kill for his role in the July 2015 stabbings.The jury deliberated more than five hours. The Tulsa World reported half the jurors wept as the verdict was read. The sentencing phase will begin Thursday morning to determine whether he will ever have the chance for parole.Bever was 16 when authorities said he and brother Robert Bever, 21, killed their parents, two younger brothers and 5-year-old sister. A fourth sibling was critically injured and a toddler was unhurt. According to the newspaper, Bever family members suffered a total of 141 stab wounds. Prosecutors showed jurors an entry in a notebook Michael Bever kept in his jail cell. “Once upon a time,” Bever wrote, “there were two brothers named Michael and Robert. They hated their family, so they killed them. The end.”Prosecutors also played a 911 call made the night of the attack. Michael Bever's sister whispered "help" and said, "My brother is attacking my family." She is heard saying, “Michael, please don’t murder me,” before the phone went dead.Robert Bever, who was 18 at the time of the killings, pleaded guilty in 2016 and was sentenced to life in prison without parole.Michael Bever was accused of acting with his older brother to stab their parents and younger siblings to death inside their home in Broken Arrow, located about 14 miles southeast of Tulsa. Michael Bever did not testify in his own defense, and his attorneys relied heavily on the testimony of Robert Bever, who told his brother’s jury that he wanted to take responsibility for all of his family members’ deaths.Robert Bever testified that he lied to police about Michael Bever’s involvement and that he did not see his brother attack anyone.Michael Bever's defense attorney Corbin Brewster told jurors Michael “got caught up in his mentally ill brother’s fantasy turned reality turned nightmare.”But Robert Bever also testified that his brother knew about his plans to kill their family before the attack and that he tricked three of his siblings into opening locked doors after they attempted to hide from the older brothers.In a videotaped interview that jurors saw last week, Michael Bever told two detectives that he stabbed his 10-year-old brother and his mother, April Bever. Her blood was found on the T-shirt he was wearing when he was arrested.

TULSA, Okla. —

Warning: Details included in this article are disturbing and may be upsetting to readers

A jury in Oklahoma found the younger of two brothers guilty late Wednesday night of fatally stabbing their parents and three siblings.

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Jurors handed down the verdict during the fourth week of the trial of Michael Bever, 19, who was charged with five counts of first-degree murder and one count of assault and battery with intent to kill for his role in the July 2015 stabbings.

The jury deliberated more than five hours. The Tulsa World reported half the jurors wept as the verdict was read.

The sentencing phase will begin Thursday morning to determine whether he will ever have the chance for parole.

Bever was 16 when authorities said he and brother Robert Bever, 21, killed their parents, two younger brothers and 5-year-old sister. A fourth sibling was critically injured and a toddler was unhurt. According to the newspaper, Bever family members suffered a total of 141 stab wounds.

Prosecutors showed jurors an entry in a notebook Michael Bever kept in his jail cell.

“Once upon a time,” Bever wrote, “there were two brothers named Michael and Robert. They hated their family, so they killed them. The end.”

Prosecutors also played a 911 call made the night of the attack. Michael Bever's sister whispered "help" and said, "My brother is attacking my family." She is heard saying, “Michael, please don’t murder me,” before the phone went dead.

Robert Bever, who was 18 at the time of the killings, pleaded guilty in 2016 and was sentenced to life in prison without parole.

Michael Bever was accused of acting with his older brother to stab their parents and younger siblings to death inside their home in Broken Arrow, located about 14 miles southeast of Tulsa.

Michael Bever did not testify in his own defense, and his attorneys relied heavily on the testimony of Robert Bever, who told his brother’s jury that he wanted to take responsibility for all of his family members’ deaths.

Robert Bever testified that he lied to police about Michael Bever’s involvement and that he did not see his brother attack anyone.

But Robert Bever also testified that his brother knew about his plans to kill their family before the attack and that he tricked three of his siblings into opening locked doors after they attempted to hide from the older brothers.

In a videotaped interview that jurors saw last week, Michael Bever told two detectives that he stabbed his 10-year-old brother and his mother, April Bever. Her blood was found on the T-shirt he was wearing when he was arrested.